William h



(No Model.)

W. H. SIMPKINS.

SEWER PIPE BACK PRESSURE VALVE.

No. 353,888. Patented Deo. '7, 1886.

i l l UNITED STATES PATENT OFFICE.

WILLIAM H. SIMPKINS, OF ST. LOUIS, MISSOURI.

SEWER-PIPE BACK-PRESSURE VALVE.

SPECIFICATION forming part of Letters Patent No. 353,888, dated December 7, 1886.

Application led August 23, 18H6. Serial No. 21l,594.

' Pressure Valves, of which the following is a full, clear, and eXact description.

" The improvement is in effect a new article of manufacture-namely, a section of clay pipehaving a metallic valve-seat and valve, the valve-seat being shaped and cemented into a bearing in the pipe, Substantiallyas is hereinafter Inore particularly described, and forming an article of merchandise ready for insertion in the connection leading from the house to the sewer.

In the annexed drawings, making part of this specification, Figure lis aplan ot' the i1nproveinent. Fig. 2 is a vertical longitudinal section on the line 22 of Fig. 1. Fig. 3 is a vertical cross section on the line 3 3 ot' Fig. 1, and Fig. 4 is a vertical section illustrating the application of the improvement.

The same letters ot' reference denote the same arts.

p A representsthe section of clay pipe,which, so far as molding and burning it is concerned. is constructed in the same manner as other earthen pipes. Its shape is also the same as that now in use, saving as itis modified by the improvement. 'Ihepinlct to the section is at a, the outlet in the direction of the sewer is at a', and at a'2 is the opening to the Ventilatingpipe E.

B represents the valve-seat. It is tted into a groove, ai', made for it in the lower portion of the pipe A, between the inlet ct and the opening a2, by which the lower portion of the valve-seat is secured in the pipe. The dropping of the valve-seat into the groove leaves (No model.)

an opening between the upper portion of the valve-seat and the shell of the pipe above it. This opening is filled with cement, C, which serves both to close the opening and also to brace the valve-seat at its upper part, and so that any How through the inlet a, against the valve-seat cannot dislodge the valveseat from its position in the pipe, and so that from the opposite direction .the contents of the sewer cannot escape backward past the valveseat between it and the shell of the pipe. The valve D is hinged at d to the valve-seat. It closes against the valve-seat when there is a backpressure from the sewer,in which case the flow rises into the pipe E, Fig. 4. In this lastnamed view, F represents a cellar, and G represents the line ot' pipe leading from the cellar to the sewer, which is not shown. The position of the valve when opened is indicated by the broken lines in Fig. 2. Thevalveis provided with a handle, d', to enable the valve to be opened by means ofa hook introduced through the opening a2.

l desire not to be limited to an earthen pipe, A, as itmay be made of other material, such as cast-iron.

I claimrlheherein-descrbed new and useful article of manufacture, consisting ofthe earthen pipe A, the valve-seat B, and valve D, said valveseat at its lower end being held in adepression or groove in the pipe, and at its upper end being secured by the wedge C, substantially as described.

WILLIAM H. SIMPKINS.

Witnesses:

C. D. MOODY, J. W. lione. 

